.pickerView-area{
  position: fixed;width: 100%;bottom: 0;border-top: 1px solid #ddd;
  .pickerView{width: 100%; height: 500px;border-top: 1px solid #ddd;}
  .mask,.popup-content{position: fixed;width: 100%;}
  .mask{left: 0;top: 0;height: 100%;background-color: #000;opacity: 0.5;z-index: 999;}
  .popup-content{bottom: 0;background-color: #fff;z-index: 9999;transform: translateY(0); }
}